Glacial Evidence Of Continental Drift
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Ever wondered how Earth has vii continents today? The theory of continental migrate is the earliest caption of how geologists thought the continents moved over fourth dimension.
Run across the fact file below for more data on the Continental Drift or alternatively, you can download our 26-page Continental Migrate worksheet pack to utilise within the classroom or home surroundings.
Key Facts & Data
Early on Beginnings
- Alfred Wegener was widely credited for the theory of continental migrate equally he was the offset one to write and publish a detailed and comprehensive theory. Although Wegener was the first one to write about continental migrate, at that place were many others earlier him who had a similar idea.
- In the 1800s, Alexander von Humboldt noticed the similarity in the coastlines of South America and Africa. He theorized that continents bordering the Atlantic Body of water were one time continued.
- French scientist, Antonio Snider-Pellegrini argued that the presence of two identical plant fossils in North America and Europe were not possible unless these two continents were once connected. He added that there is no other plausible explanation for this.
- Another is Frank Taylor, who in 1908 proposed that the formation of mountain ranges is due to continental collision.
- Finally, in 1912, Alfred Wegener published a paper explaining how the continents were once office of a single landmass, a supercontinent called Pangaea. This included several pieces of show to support his theory.
Testify SUPPORTING CONTINENTAL DRIFT
CONTINENTAL JIGSAW
- Like other scientists before him, Alfred Wegener also noticed that there was a remarkable similarity betwixt the coastlines of South America and Africa. It seems that the coastlines of the two continents fit each other and may have been 1 land earlier.
- Although Southward America and Africa seem to have coastlines that fit each other, the get-go jigsaw fit Wegener made was non perfect.
- Opponents of the theory also pointed this out and even added that erosion makes information technology impossible to have these two coastlines fit each other perfectly.
- Afterwards on, it was found that a better fit would happen if the edges of the continental shelf were included. Thus, scientists included the continental shelf submerged underwater and produced a much greater jigsaw fit of the coastlines of South America and Africa.
FOSSILS MATCH Beyond SEAS
- Alfred Wegener learned through his readings that most palaeontologists agreed that there must be some type of land connectedness that immune fossils of the aforementioned species to be formed and discovered in widely separated landmasses.
- An example of this is the fossils of the ancient reptile mesosaurus plant in S America and Africa. This reptile is a freshwater organism that at but a meter long and could not take swum the Atlantic Ocean to reach the other two continents.
- The presence of the fossils of mesosaurus on these two continents further suggests that South America and Africa were once connected or once a single landmass, surrounded by lakes and rivers.
- Bated from this ancient reptile, Wegener as well plant that there are tropical found fossils in Svalbard, Kingdom of norway. This finding suggests that Svalbard must take had a tropical climate before. A very different climate compared to what it has now – arctic.
Rock TYPE AND Structure
- Another piece of prove presented past Wegener is the unlike rock types and structures that are of the same age but are found on unlike continents.
- 2.2 billion-year-old igneous rocks found in Brazil accept a shut resemblance with similarly aged rocks in Africa.
- Some other show is the Appalachian Mount Range found in the eastern United States. Mountains of similar age and structure are found in Greenland, Scandinavia, and the British Isles.
ANCIENT CLIMATE
- Aside from Svalbard's tropical plant fossils, there are other pieces of prove found which suggest that there have been changes in the climate design of the dissimilar continents.
- Glacial debris of the same age was found on the continents of South America and Africa, as well equally in India and Australia.
- Wegener likewise discovered that a large tropical swamp once existed in the Northern Hemisphere. This tropical swamp is the reason backside the major coalfields found in Europe, Siberia, and the eastern The states.
- These pieces of bear witness suggest that there must take been a shift from their former location to the current resulting in a shift in climate patterns.
THE Keen DEBATE AND A NEW PARADIGM
- Wegener'southward continental drift theory received lots of criticism. One of the major objections against his theory is the lack of a mechanism capable of moving continents across the globe.
- He proposed that the tidal influence of the Moon was strong enough to motion the continents. Harold Jeffreys immediately countered this argument saying that if this is true, Earth would stop rotating in a affair of years.
- Due to the failure to provide a mechanism capable of moving continents, Wegener and his continental migrate theory were not accepted and forgotten until the 1960s.
- Currently, Wegener's continental drift theory is office of the theory of plate tectonics together with other theories that aid explain mechanisms capable of moving continents.
Continental Migrate Worksheets
This is a fantastic bundle that includes everything yous demand to know about Continental Migrate across 26 in-depth pages. These are ready-to-utilise worksheets that are perfect for teaching about the Continental Drift which is the primeval caption of how geologists thought the continents moved over time.
Complete List Of Included Worksheets
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Use With Whatever Curriculum
These worksheets take been specifically designed for use with any international curriculum. You can use these worksheets as-is, or edit them using Google Slides to brand them more than specific to your own student power levels and curriculum standards.
Glacial Evidence Of Continental Drift,
Source: https://kidskonnect.com/science/continental-drift/
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